a pendulum clock having Copper keeps time at 20 degree Celsius it gains 15 second per day if cooled to 0°C celsius calculate the
2 answers:
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Answer:
Explanation:
Mass of object = m
Height above planet = h
Mass of planet = M
Radius of planet = R
As we have to find out velocity, so let's apply the law of conservation of energies on initial( when the object was at height) and final( when object hit the surface points.
Initial energy = Final energy
Answer:
49.79 m/s
Explanation:
Given:
Initial velocity of the roller coaster is,
Vertical drop or the displacement of the roller coaster is,
The displacement is negative as the motion is in downward direction.
Now, as the motion is in vertical direction only, the acceleration of the roller coaster will be due to gravity acting in the downward direction.
So, the acceleration of the roller coaster is,
Now, using the following equation of motion:
Where, 'v' is the velocity of the roller coaster at the bottom.
Plug in all the given values and solve for 'v'. This gives,
Therefore, the speed of the roller coaster at the bottom of the drop is 49.79 m/s.